TX-NR1000
IC BLOCK DIAGRAM AND DESCRIPTION
TLC2932IPWLE(High-Performance Phase-Locked Loop)
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8
LOGIC V
DD
SELECT
VCO OUT
FIN ±A
FIN ±B
PFD OUT
LOGIC GND
VCO V
DD
BIAS
VCO
IN
VCO GND
VCO INHIBIT
PFD INHIBIT
NC
PW PACKAGE
(TOP VIEW)
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME
NO.
I/O
DESCRIPTION
FIN ± A
4
I
Input reference frequency f(REF IN) is applied to FIN ±A.
FIN ± B
5
I
Input for VCO external counter output frequency f(FIN ±B). FIN ±B is nominally provided from the external
counter.
LOGIC GND
7
GND for the internal logic.
LOGIC VDD
1
Power supply for the internal logic. This power supply should be separate from VCO VDD to reduce
cross-coupling between supplies.
NC
8
No internal connection.
PFD INHIBIT
9
I
PFD inhibit control. When PFD INHIBIT is high, PFD output is in the high-impedance state, see Table 3.
PFD OUT
6
O
PFD output. When the PFD INHIBIT is high, PFD output is in the high-impedance state.
BIAS
13
I
Bias supply. An external resistor (RBIAS) between VCO VDD and BIAS supplies bias for adjusting the
oscillation frequency range.
SELECT
2
I
VCO output frequency select. When SELECT is high, the VCO output frequency is y 1/2 and when low, the
output frequency is y 1, see Table 1.
VCO IN
12
I
VCO control voltage input. Nominally the external loop filter output connects to VCO IN to control VCO
oscillation frequency.
VCO INHIBIT
10
I
VCO inhibit control. When VCO INHIBIT is high, VCO OUT is low (see Table 2).
VCO GND
11
GND for VCO.
VCO OUT
3
O
VCO output. When the VCO INHIBIT is high, VCO output is low.
VCO VDD
14
Power supply for VCO. This power supply should be separated from LOGIC VDD to reduce cross-coupling
between supplies.
1/2 fosc
Phase
Comparator
LOGIC VDD (Digital)
LOGIC GND (Digital)
SELECT
FIN ± A
VCO INHIBIT
PFD INHIBIT
NC
VCO GND
VCO IN
BIAS
VCO VDD
VCO
1
2
3
4
5
6
7
14
13
12
11
10
9
8
FIN ± B
VCO OUT
PFD OUT
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